Order of the Fly
Their home is known to the servants of Order as the Blighted Duchies. The order is similarly known as fallen knights, indeed Sir Roggen of the Order of the Furrow calls them Monsters and fools in service to daemons. He does also note that that they retain elements of their ancient honour.
One of the central tenets is Clarity. This they see as Nurgle’s gift to his chosen so that they may see the world as it is, stripped bare of desire and hope, leaving only a beautiful despair. The members of the Order are thus able to find comfort in surrender, joy even love in acceptance, at the heart of all endings, and finally serenity at the end of all things. It is this serenity which they seek to impart to what they call the ignorant and the savage. [5b]
With the Herald of Nurgle, Dolorous Gurm, Blightmaster Wolgus led a crusade, through the Ithilian Gate into the Realm of Shyish to bring the crrupted life of Nurgle to the land of the dead. Nagash himself rose against them and the crusade was destroyed.
Age of Sigmar
At the Varanspire they competed with the Silver Knights in a tournament that moved through eight circles of the fortress city, the Fly defeating the Silver Knights several tiems before they reached the Fifth, which was also a victory for the followers of Nurgle. [8a]
Members of the Order
Their greatest strength is their knights who ride powerful mutated and tainted steeds and who are often accompanied by lesser Rotbringers serving as armsmen. These are often well trained, dress in hauberks made from toad-dragon hide and carry wide iron-rimmed shields as well as festering blades and spears. [5b] To become a full knight a squire must quest through the gardens of Nurgle. Each must quest for and taste the sour syrup of the Flyblown Chalice carried by the Lady of Cankerwall herself. Only then may they take the seven times seventy-seven oaths to the King of All Flies. [5b]
- The Lady of Cankerwall: Bearer of the Flyblown Chalice, a Seer to the order and who first converted the Duchies to the worship of Nurgle. 
- Tulg the Wide: A sorcerer who was part of the crusade into Shyish led by Blightmaster Wolgus, he was slain by Neferata.[5a]
- Bubonicus: Once known as Timar Bellicos, he was Blightmaster at the defence of the Sargasso-citadels of the Verdant Bay, even when killed he can return via the Maggot curse.
- Sir Culgus: He held the Bridge of Scabs with Blightmaster Wolgus for twelve days against the hordes of Khorne.
- Count Dolorugus: He attempted to turn the ancient reed-city of Gramin into a bastion and temple to Nurgle. 
- Sir Feculus: A knight of the Duchy of Bitterbile, he entered the Writhing Weald to reclaim Lifebiter and the body of his fallen kinsman, Duke Goral. 
- Sir Festerbite: Second in command of the Crusade into Shyish.[5a]
- Gaspax Gahool: Blightmaster who lead the fifth pox-crusdae into the Realm of Ulgu.
- Duke Gatrog of Festerfane: One of the comamnders of the defence of the Sargasso-citadels of the Verdant Bay.
- Duke Goral of Festerfane: He tried to destroy the Writhing Weald but he and his retinue were slain by Drycha Hamadreth, his body and his axe entombed at the heart of the forest, watched over by her Outcasts. 
- Carkus Gryme: Heir to the duchy of Festerfane, he pursued the Stalking Keep to rescue the Lady of Cankerwall.
- Sir Pusjaw: A beastman knight who fought in the defence of the Sargasso-citadels of the Verdant Bay.
- Count Pustulix: Challenged the Stormcast Enyo of the Steel Souls, she merely shot him with a star fated arrow, stating There is no honour in battle, only in victory.
- Sir Vulgarix of Festerfane: He defeated Trux the Changeworthy in the Tournament of the Fly and the Fish wirce, once in the joust, and a second time when his opponent became a Chaos Spawn. [8a]
- Ocander Wolgus: Blightmaster who led a crusade into the Realm of Shyish in the Age of Chaos and was slain there at the Mandible by Neferata.[5g]
- Blisterback: Pestigor squire to Carkus Gryme and his father before him. 
- Onogal the Troubadour. 
- Huntmaster Uctor
The Blighted Duchies
- Cankerwall: It is known for its great houses, high ramparts and boil-domed temples. [5e]
- Pallas Ghyredes[5b]
|The King of All Flies rules all things – not just sickness. But I have little interest in theological debate. Let us settle this argument in the way of true knights – with blood and steel. To the winner, the spoils
~ Sir Feculus to Sir Roggen.
- 1: The Tainted Axe (short story)
- 2: Legends of the Age of Sigmar: Sylvaneth - The Resolute (short story)
- 3: Legends of the Age of Sigmar: Sylvaneth - The Outcast (short story)
- 4: Plague Garden (novel)
- 5: Nagash: The Undying King (novel)
- 6: Order of the Fly: Tourney of Fate (short story)
- 7: Age of Sigmar Roleplay: Soulbound
- 7a: Ghyran, pg. 177
- 8: Scourge of Fate
- 8a:Part Five: The Fly and the Fish, pg. 81-
- 9: Battletome: Slaves to Darkness (2019)
- 9a: Annals of Ruin, Pg. 20-23